1 January 13, 2013 HW Initial version. 2 February 2016 HW Conversion to asciidoc, removal of sysmoBTS specific parts. 3 April 2024 AC Replace NS chapter with new NS2 chapter to match the code. Harald Welte hwelte@sysmocom.de HW sysmocom sysmocom - s.f.m.c. GmbH Managing Director Alexander Couzens acouzens@sysmocom.de AC sysmocom sysmocom - s.f.m.c. GmbH Developer 2013-2024 sysmocom - s.f.m.c. GmbH Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". The Asciidoc source code of this manual can be found at https://git.osmocom.org/osmo-gsm-manuals/